Well heres an example of what is happening (i'm not too good at laying out my maths):
Adj = 4
Hyp = 10
Cos x = 4 ÷ 10
X= cos(-1) 0.4
The answer should be 66.4 but on my casio casio s-v.p.a.m it says 0.99997563
what am i doing wrong?
heres a link to the calculator if it helps